The Emerald Network is a network of Areas of Special Conservation Interest (ASCIs), which is to be established in the territory of the Contracting Parties and Observer States to the Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention), including Central and Eastern European countries and the EU Member States. For EU Member States, Emerald Network sites are those of Natura 2000.

The biogeographical regions dataset contains the official delineations used in the Habitats Directive (92/43/EEC) and for the EMERALD Network set up under the Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention). The 2015 version includes updated delineations of regions in Caucasus area. Errors in the delineation of the ATL region have been corrected in a newer release. This dataset should not be used anymore.

The biogeographical regions dataset contains the official delineations used in the Habitats Directive (92/43/EEC) and for the EMERALD Network set up under the Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention). The 2015 version includes updated delineations of regions in Caucasus area. This version (2015, version 2) corrects an error in the delineation of the ATL region contained in the release 2015, version 1.

The biogeographical regions dataset contains the official delineations used in the Habitats Directive (92/43/EEC) and for the EMERALD Network set up under the Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention). The Pannonian region of Serbia was missing in previous versions and this has been corrected in the 2016 version. Some Arctic islands which do not belong to the European part of Russia and which were erroneously included in previous versions have been removed.